Case for steam-boiler levels



APPLICATION FILED FEB. 14.1918.

Patentedsum 14, 1921.

UNHEQ STATES LnoNannoMosr/irnnr, or rrionnnon, ITALY.

nsaigiao.

. Specification of Letters Patent.

CASE FOB STEAlVI-BOILER LEVEIS.

Patented J une M, T921.

Application led February 14, 1918. Serial No. 217,281.

To @ZZ whom t may concern.'

Be it known that I, LEONARDO lvlosar'innr, subject of the King of Italy, residing at Florence, Italy, have invented new and useful Improvements in a Case for Steam- Boiler Levels, of which the following is a specification.

My invention relates to water gages for steam boilers or the like, and more particularly to the type of gages which are adjustable to prevent leakage between the component parts of the gage.

An object of my invention is the provision of a water gage of the above described character, wherein the supporting casing is associated with the glass plate in such manner that the distortion of the edges of the glass plate is uniform throughout their length, thus causing the glass plate to bend only in a transverse direction, thereby greatly increasing its power of resistance to withstanding excessive pressures of steam without breaking.

I will describe one forni of gage embodying my invention, and will then point out the novel features thereof in claims.

In the accompanying drawings, Figure l is a view showing in longitudinal sect-ion one forni of gage embodying my invention.

Fig. 2 is a view showing iii transverse section the gage shown in Fig. l.

Referring to the drawings in detail, a designates a metal casing which is of substantially U-shaped formation in cross-section throughout its entire length. The parallel portions of the casing a are inturned throughout their length to provide coeXtensive rims Z). These rims Z2 coact with the parallel portions 0f the casing to slidably receive a glass plate m, so that the plate m may be inserted and removed fi'om the casing at either end c or c thereof.

Disposed within the casing a and interposed between the glass plate f@ and the rear wall of the casing is a conduit d which serves to conduct the water and steam rearwardly of the glass plate for indicating the pressure within a boiler. The or portion of the conduit (Z is substantially U- shaped in cross-section and is arranged within the casing a, so that its longitudinal edges bear against the inner marginal edges of the glass plate as shown in Fig. Q. The opposite ends of the conduit Z are formed with bored extensions e and e', which project beyond the ends of the casing aand communicate with the interior of the Iconduit to conduct steam and water to the gagein the usual way.

lo prevent leakage between the parts of the gage, the conduit (lis forcedagainst the back of the O'lass plate a by means of the binding screws m which extend through the casing a and bear upon the back of the con-` against the rims b, the latter reacting to.

prevent lateral displacement of the plate by virtue of the inherent elasticity of the metal. Because the rims Z) engage the marginal edges of the plate a; throughout their entire length, the pressure exerted on the plate is distributed uniformly over the entire length of the rims thereby preventing the plate bending longitudinally but allowing the same, in a restricted manner, to bend trans-- versely, thus greatly increasing the power of resistance of the glass plate, and, correspondingly, reducing the liability of breakage. v

From the foregoing description it will be manifest that I have provided a water gage in which the glass plate is prevented from bending longitudinally, and is only permitted to bend along its shortest dimension,

thus producing a gage in which the liability ofthe glass plate breaking is reduced to a minimum.

Although I have herein shown and described only one form of water gage embodying my` invention, it is to be understood `that various changes and modifications may be made herein without departing from the .spirit and scope of the invention, and the yscope of the appended claims.

vWhat I claim is: Y l. A water gage comprising a conduit, a

glass plate, and a casing provided with means for supporting said glass plate only along its longitudinal edges.

2. A water gage comprising a metallic casing having side portions which are free to expand outwardly, rims formed on the longitudinal edges of said casing, a glass plate within the casing and adapted to bear llO on said rims, and a conduit in the rear of the plate and ooacting with the latter to provide a chamber for receiving steam and Water under nWhose pressure the glass plate is allowed to flex transversely only, because of the expanding movement of the side portions of said casing.

3. A fluid gage, comprising an open-ended metallic casing having side Walls disunited at the front of the casing and united at the back, each of said side walls having at the front an inwardly extending longitudinal flange, aglass plate Within the casing and supported by said anges along its longitudinal edges only, and a conduit-forming member Within said casing and adapted to bear on the rear side of the plate adj aoent the longitudinal edges thereof, the front face of said plate being Jfree of support at all points be tween said longitudinal iianges.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

LEONARDO Most/HEEL 

